Drill-steel coupling



ISUQQQ@ April 14, 1931.

6% cui 61H amie/z BY@ K Patented Apr. 14, 1931 UNITED STATES PATENT OFFICE.

CHARLES C. HANSEN, OF EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLLRAND COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION F NEW JERSEY DRILL-STEEL COUPLING Application led July 12,

This invention relates to couplings, but more particularly to a coupling adapted to secure together sections of drill steel, such as may be employed with rock drills.

Drill steels of great length, such as are frequently used in deep hole drilling operations, are cumbersome to transport and when broken at any point must bereplaced in their entirety. To avoid these diiiculties I contemplate using a drill steel of built-up construction comprising two or more sections joined by my improved coupling.

The primary object of the present invention is to enable drill .steel sections to be connected in such manner that they will not become separated by jarring or rotation of the drill steel.

Another object ot the invention is to enable drill steel sections to be quickly connected and disconnected.

A further object of the invention is to reduce the amount et breakage of couplings of this type.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawings illust-rating the invention and in which similar `reference characters refer to similar parts,

Figure 1 is a. sectional elevation of a drill so steel coupling constructedin accordance with the practice ofthe invention and operatively connecting a pair of drill steel sections,

Figure 2 is a transverse View taken on the line 22 of Figure l looking in the direction indicated by the arrows, and

Figure 3 is a transverse view taken on the line 3-*3 of Figure 1 looking in the direction indicated by the arrows.

Referring to the drawings, A and B designate drill steel sections which itis desired to secure together. The section A is an extension member and may comprise a body portion C and identical shank portions D at either end of the body portion C. Between the body portion C and the shanksD are `formed one or more lateral lugs E herein shown as a pair of diametrically opposed lugs similar to those `used on standard drill steels of the Leyner type. The upper portion of the section A (not shown) is adaptedto Vbe engaged by,

`A and B will be avoided.

1930.` Serial No. 467,394.

the chuck parts of a rock drill in a Well known manner whereby rotation of the chuck parts will be transmitted to the drill steel.` The section A is adapted to be secured at its lower end to the section B by means which shall be sections A and B preferably are of equal di- Y ameter and if desired may be provided with longitudinally extending registering pas* sages K for conveying cleansing iiuid to the drill hole.

In accordance with the present invention the Shanks D and J are adapted to be in serted into the bore L ot a coupling sleeve O from the opposite ends thereof. APreferably the diameter ot the bore L is only slightly greater than the? diameters of theA shanks D andJ so that misalignment of the sections The combined lengths of the Shanksk D and .l should exceed the length of the bore L so that the Shanks may bear against each other when assembled thus assuring .the direct transmission ot force from the section A to the'section B.

The means employed for preventing relative endwise movement of the sections A and B and to enable the transmission of rotary movement of the section A to the section B comprises in this instance a pair of retaining nuts P and Q which preferably are identical in all essential respects. -The nuts P and y are provided with axial threaded sockets R toreceive correspondingly threaded end por- `The nuts P and Q are also provided with reduced bores U in one end coaxial with the `sockets S uto permit the insertion of the Shanks D and J into the bore L. Preferably the sleeve O is provided with an enlarged intermediate portion. V the diameter of which may be substantially equal tothe ex lternal diameters of the nuts P and Q, and the diameters of eachof these members should tions S and Trespectively of the sleeve O.

Vbe 'somewhat smaller the diameter of the cutting bit F. v

Ineach of the nuts P and Q between the recesses S' and the boresU are formed chuck-v axes. In orderto enablethe lugsE and G` and Q respectively, slots Xmay be formed in the nuts P and Q in the longitudinal plane of the bores U.` The slots X are soilocated with respect to the cavi-ties vfthatqrotationof the sections A and B may cause the lugs and: G to lbear :aga-inst the-Walls Y `of fthe" :cavities IV in which position they `Will be'out of alignment -Withl the slots l thus' lockingr possible tode'tachvthe parts Withoutdiiiiculty.`

said sections Withinthenuts P and Q.

7neet-ion between the coupling andthe drillv :steelsectionsA rand B.A To this end I arf range the slots X so that thcnormal tendency toward relativerotat-ion ofthe sections A JandB, caused by rotativevmovement impart- -fed'to' the section, A: and resistance to rotation aiiorde'd bythe bit F,jwill hold the lugs E and G against the Walls Y. yI'also'select the :direction of threads on the sleeve O and the rotation ofthe drill steel so that the tendency` toward relative rotation of the nuts P and Q will cause.2 the nuts to become vmore 1 tightly fthreadedfon the threaded .ends and T `of Vfthe sleeve O. This involvesthreading the tion ofl the drill steel and threading thenut Q onto the end Tin the directionopposed-.to f

o the'direct-ion of rotation ot thedrill steel.

irDfue to the fact that the nuts kP and vQ will abe'drawn up vtightly on the opposite ends vof the sleeve Othe Shanks D and J will be caused to bear firmly -against each other, thereby f tions;- the nuts Pfand Qmay be provided With"L `suitable Wrench 1receivingsurfaces Z.

'toolftoiapoint atWhic-h-the ends -Si-and T will llyfon theends Sandthe'a'djacent ends of v rthefshalnks D landJ'vwillibe carriedintoabutn' v65 Iting relation.; The Vdrill. steel vwill Vthen be -faces Z of *each-nut P and Qrand exerting a -torce to rotate thenuts in opposite direcby- ,endwise movement. Y

` fI contemplate employing the forceof rota-` tion of thefdrillx-steel to assure atight con :ofmembers disposed in endto end contactsleeve andi `engaging .said :lugs to dravvthe i: -members into abuttingV relatlon Within :said

Inrassembling thedev-icefthe nuts PA and .Q1 may irstbe threaded on the" reduced ends SVv 1 in the bore, a Vlug onthe male member; a nut kand VTV respectively by kmeans ofrafsuitabley nhaving a threaded recess to receive, saidfe- V"bespafcedaslight-ly from'the bottombf theA ifwsocketsKR.VH The sections `A andfB maythentK z'befinserted intofthe" aligned vbores kU `andlLV @the nslot, and a- Walll -in the cavity "to" bear ready for connection to a drilling machine.

. In order to assure easy disconnection of the sections A and B it is desirable that lugs E and G do not cont-act with the ends ofthe sleeve O. By applying Wrenches to the surm tions one or both of the nuts may be unscrewed to a slight extent from the sleeveO.

'This permits either 'of thesections A andB v. t Yto berotated' to'carry the `lugsthereon mto alignment with the slots X whereupon the sectionsmay be removed from the coupling In this construction the threads never become either cut or jammed by blows imparted to thexdrillstel bythe roclrd'rill, andi although theconnection is .r secure f itis always I claim ing relation, a: coupling-sleeveadapted tol rev ceive the adjacent ends of the -members,alug

on eachv ofthe members, and nuts threadedon; 9o

ithe ends ofthe coupling rvmembers andl bearing against the lugs to'press the-adj acent ends voit' the members iirmlytogether.

.2. In acoupling7 the combination of aV pair of members disposedfiniend to end .contacting 95 'nutsP and Q .with reference to direction of 'f 4each of the members, -and-*nuts threaded in opposite directions on'rthe oppositeV ends yof the coupling sleeve A`andfbearingl againstathe 1 100 AV.lugs .topress'fthe ends of'fthefniembers t0- lnut'Ponto theendS in the direction of rota-g;l

relation and having-smooth adjacentxendloa portionsfa" couplingV Y"sleevel adapted' to slid- Vably receive the adjacent 'end v portions of the members, a lug on each' of the membersgland nuts threaded on theends fofthe-coupling coupling sleeve. Y

4., In Ya'coupling, afemale member-having fa bore-and atvvall at oneiend ofthefboreya male memberlfadapted to be'slidablyreceived male member and an opening to receivejthe male member, aslot` in one-'end of the fnut to allow 'insertion ofjthe"luglthereinwhen vthe'gff120 o nut -is assembled `on'the =female'member,`a cavityin :the nutc at one vend"k of the 7slot tof permit Y the'male member to'befrotatedwithin the'nut Y for carryingft'he lug out of alignment withV 5125 against the lug fortransmitting rotation-of then-ut tothe malemember.' Y Y fInfacoupl'ing;thecombinationgof a-pair of members disposed in endt'o-end relation; a

coupling-1y 4sleeve adapted "to l'slidably receive "130 the adjacent ends of the members, nuts thi'eaded on the opposite ends of the coupling sleeve and having openings in their outer ends to receive the members, slots in the outer ends ot the nuts to alloW insertion of the lugs into the nuts, cavities communicating with the slots to permit rotation of the members in the nuts to carry the lugs out of alignment with the openings, said nuts seating adjacent the legs to press the adjacent ends ot the members irmly together.

In testimony whereof I have signed this specification.

CHARLES C. HANSEN. 

